Canister



FIG. 1 is a top perspective view of an ornamental design for a canister.

FIG. 2 is a bottom perspective view of the canister of FIG. 1.

FIG. 3 is a front elevation view of the canister of FIG. 1.

FIG. 4 is a top plan view of the canister of FIG. 1; and,

FIG. 5 is a bottom plan view of the canister of FIG. 1.

The left-side elevation view, right-side elevation view, and back elevation view are identical to the front elevation view. 

CLAIM The ornamental design for a canister, as shown and described. 